636bcee355
Hopefully no old bootloaders are around. If otherwise, revert to last commit before this and update the DFU bootloader.
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "general.h"
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#include "usbdfu.h"
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#include <libopencm3/stm32/flash.h>
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#include <libopencm3/cm3/scb.h>
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#define FLASH_OBP_RDP 0x1FFFF800
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#define FLASH_OBP_WRP10 0x1FFFF808
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#define FLASH_OBP_RDP_KEY 0x5aa5
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#if defined (STM32_CAN)
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# define FLASHBLOCKSIZE 2048
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#else
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# define FLASHBLOCKSIZE 1024
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#endif
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static uint32_t last_erased_page = 0xffffffff;
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void dfu_check_and_do_sector_erase(uint32_t sector)
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{
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sector &= (~(FLASHBLOCKSIZE - 1));
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if (sector != last_erased_page) {
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flash_erase_page(sector);
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last_erased_page = sector;
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}
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}
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void dfu_flash_program_buffer(uint32_t baseaddr, void *buf, int len)
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{
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for(int i = 0; i < len; i += 2)
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flash_program_half_word(baseaddr + i,
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*(uint16_t*)(buf+i));
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/* Call the platform specific dfu event callback. */
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dfu_event();
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}
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uint32_t dfu_poll_timeout(uint8_t cmd, uint32_t addr, uint16_t blocknum)
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{
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(void)cmd;
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(void)addr;
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(void)blocknum;
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return 100;
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}
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void dfu_protect(bool enable)
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{
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if (enable) {
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#ifdef DFU_SELF_PROTECT
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if ((FLASH_WRPR & 0x03) != 0x00) {
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flash_unlock();
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FLASH_CR = 0;
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flash_erase_option_bytes();
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flash_program_option_bytes(FLASH_OBP_RDP, FLASH_OBP_RDP_KEY);
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/* CL Device: Protect 2 bits with (2 * 2k pages each)*/
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/* MD Device: Protect 2 bits with (4 * 1k pages each)*/
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flash_program_option_bytes(FLASH_OBP_WRP10, 0x03FC);
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}
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#endif
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}
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/* There is no way we can update the bootloader with a programm running
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* on the same device when the bootloader pages are write
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* protected or the device is read protected!
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*
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* Erasing option bytes to remove write protection will make the
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* device read protected. Read protection means that the first pages
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* get write protected again (PM0075, 2.4.1 Read protection.)
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*
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* Removing read protection after option erase results in device mass
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* erase, crashing the update (PM0075, 2.4.2, Unprotection, Case 1).
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*/
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#if 0
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else if ((mode == UPD_MODE) && ((FLASH_WRPR & 0x03) != 0x03)) {
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flash_unlock();
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FLASH_CR = 0;
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flash_erase_option_bytes();
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flash_program_option_bytes(FLASH_OBP_RDP, FLASH_OBP_RDP_KEY);
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}
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#endif
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}
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void dfu_jump_app_if_valid(void)
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{
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/* Boot the application if it's valid */
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if((*(volatile uint32_t*)app_address & 0x2FFE0000) == 0x20000000) {
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/* Set vector table base address */
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SCB_VTOR = app_address & 0x1FFFFF; /* Max 2 MByte Flash*/
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/* Initialise master stack pointer */
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asm volatile ("msr msp, %0"::"g"
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(*(volatile uint32_t*)app_address));
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/* Jump to application */
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(*(void(**)())(app_address + 4))();
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}
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}
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